US3371383A - Continuous casting apparatus - Google Patents

Continuous casting apparatus Download PDF

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Publication number
US3371383A
US3371383A US593621A US59362166A US3371383A US 3371383 A US3371383 A US 3371383A US 593621 A US593621 A US 593621A US 59362166 A US59362166 A US 59362166A US 3371383 A US3371383 A US 3371383A
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United States
Prior art keywords
belts
belt
casting
rollers
run
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US593621A
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English (en)
Inventor
Olof H Hellsund
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKN Aerospace Transparency Systems Inc
Original Assignee
Swedlow Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27050220&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3371383(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Swedlow Inc filed Critical Swedlow Inc
Priority to US593621A priority Critical patent/US3371383A/en
Priority to GB42038/66A priority patent/GB1168083A/en
Priority to NO164823A priority patent/NO136340C/no
Priority to BE687406D priority patent/BE687406A/xx
Priority to SE12926/66A priority patent/SE312426B/xx
Priority to AT899166A priority patent/AT303370B/de
Priority to DE1645387A priority patent/DE1645387B2/de
Priority to CH1390366A priority patent/CH468249A/de
Priority to NL666613601A priority patent/NL147066B/xx
Priority to DK499566AA priority patent/DK125003B/da
Priority to FR78063A priority patent/FR1497702A/fr
Priority to JP41063523A priority patent/JPS4935818B1/ja
Publication of US3371383A publication Critical patent/US3371383A/en
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/38—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/16—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length between endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/40—Compensating volume change, e.g. retraction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers

Definitions

  • support means and backing means defining a path -or the belts in accordance with the natural curvature thereof are provided and tne upper belt is maintained under a tension greater than that used to determine the natural curvature and the lower belt is maintained at a tension less than that used to determine the natural curvature.
  • Heating means are provided in the ⁇ casting zone and seal means are provided between the edges of the belts in the casting zone.
  • the present invention relates to the continuous casting of polymeric compositions.
  • polymeric compositions There has been substantial interest in casting polymeric compositions ⁇ for many years and many processes have been proposed and developed for such casting. Much of this development work has concerned the casting of acrylic and other polymerizable unsaturated organic materials.
  • the casting processes which have been previously developed comprise subjecting the polymerizable compositions to heat and/or light with or without the application of pressure.
  • a highly successful and widely used process comprises casting liquid monomer between a pair of vertical rigid sheets which sheets are provided with a peripheral gasket of flexible material to compensate for the shrinkage which occurs during polymerization, the assembly being immersed in a hot water bath or hot air oven for the length of time required to carry out the thermal polymerization.
  • the hot water bath is, of course, the source of both heat and pressure. This process has come to be known as cell casting.
  • Cell casting is, as is apparent ⁇ from the foregoing description, a batch process and, although widely used, is subject to all of the deficiencies of any batch process, viz., a substantial amount of down time between casting operations, size limitations, quality control diiculties due to inadvertent changes in pressure, temperature and composition, etc.
  • the apparatus of the present invention cornprises a pair of endless belts mounted on rollers in such a manner that the lower run of the upper belt is substantially parallel to the upper run of the lower belt for a substantial portion of their lengths.
  • These belts are arranged such that at least a portion of the lower run of the upper belt and the upper run of the lower belt follow an inclined path defined by the natural curvature of the belts.
  • the upper belt is held under sufhcient tension to tend to cause the lower run thereof to be held against support rollers positioned above this run while the lower belt is held under less tension to permit the upper run thereof to relax against rollers positioned below this run.
  • each of the belts is caused to move around its supporting rollers such that the lower run of the upper belt and the upper run of the lower belt move in the same direction and such that there is substantially no relative movement between the lower run of the upper belt and the upper run of the lower belt.
  • Liquid polymerizable monomer is fed to the intake ends of these belts and is passed through at least one heating station,
  • a liquid acrylic monomer composition is fed into the casting apparatus and is first heated to a suicient extent to cause the monomer to polymerize (or cure) and is then subjected to a further heatinsy step to postcure the polymerized composition.
  • the initial heating step may be performed by hot air heating, by causing the moving belts to pass through a zone which is liooded with hot water, or preferably, may be accomplished by spraying hot water on the external surfaces of the moving belts.
  • the critical requirement of the apparatus and process of the present invention is that the belts follow an inclined path deiined by their natural curvature whereby a pressure head of the liquid monomer is developed which is suhcient to maintain the spacing between the belts at the desired distance until the liquid has polymerized.
  • FIGURE la illustrates a side view of a portion of the apparatus of the present invention wherein the path defined by the moving belts is the natural curvature of these belts.
  • FIGURE lb illustrates the remainder of the apparatus illustrated in FIGURE la.
  • FIGURE 2 is a vertical cross-section taken on line 2-2 of FIGURE 1a which illustrates the spray means used as a source of heating medium.
  • FIGURE 3 is a Vertical cross-section taken on line 3-3 of FIGURE 2 which illustrates a side view of the spray means and moving belts.
  • FIGURE 4 is a vertical cross-section taken on line 4 4 of FIGURE 1b and shows the moving belts passing through the postcuring oven.
  • FIGURE 5 is a vertical cross-section taken on line 5 5 of FIGURE 4 and illustrates a side View of the moving belt passing through the postcuring oven.
  • the apparatus of the present invention comprises an upper belt 11 which is positioned above a lower belt 12.
  • Upper belt 11 is supported on rollers 13 and 14 while lower :belt 12 is supported on rollers 15, 16 and 17.
  • lower belt 12 is somewhat longer than upper belt 11 so as to provide exposed area 18 which serves as a convenient means Ifor feeding liquid monomer between rollers 13 and 16.
  • Support posts 19 which are provided with rollers 20 and rollers 21 provide additional support for the belts 11 and 12.
  • Roller 14 is mounted on movable support 22and support 22 is in turn connected to piston 23.
  • the tension exterted by the rollers on belt 11 may be adjusted by actuating piston 23 so as to move support 22 and roller 14.
  • Roller 15 is similarly mounted on movable support 24 which support is connected to piston 25 so that the tension exerted by the rollers on belt 12 may also be adjusted.
  • Rollers 14 and 17 are driven by motor 26 through chains 27 and 28.
  • FIGURES la and 1b are also illustrated in FIGURES la and 1b are the housing 29 for the spray means which are used to provide the heat for polymerization of the monomer and housing 30 of the postcuring oven. These heating means are illustrated in more detail in FIGURES 2-5.
  • housing 29 encloses a series of spray means, some of which are positioned above the lower run of the upper belt and are indicated generally by numeral 31 and some of which are positioned below the upper run of the lower belt and are indicated generally by numeral 32.
  • spray nozzles 33 are so constructed such that a square pattern is sprayed by each nozzle on belts 11 and 12 in the manner indicated by the broken lines emanating from each nozzle 33.
  • Each of the nozzles 33 is mounted on one of pipes 34 and the pipes 34 are connected to conduits 35.
  • Conduits 35 are connected to a source of hot water or other suitable liquid (not shown).
  • housing 29 is provided with supporting gusset 36. Gaskets 50 and 51 are also provided between belts 11 and 12 to prevent leakage of the polymerizable composition.
  • rollers 37 are provided above the lower run of belt 11 and a series of rollers 38 are provided beneath the upper run of belt 12.
  • Rollers 33 function to provide the necessary support to maintain belt 12 in the desired inclined path.
  • the spacing between belts 11 and 12 is maintained by the fluid pressure exerted by thel material being cast between them.
  • the fluid pressure is sutiicient to cause irregularities unless rollers 37 are provided to maintain belt 11 in the desired inclined path which is generally parallel to belt 12.
  • rollers 37 and 38 are preferably arranged such that they form a square pattern, i.e., such that each roller is equidistant from its adjacent rollers in both the lateral and longitudinal directions.
  • housing 29 is constructed in sections, two of which are indicated generally by numerals 39 and 40 in FIGURE 3. Each of these sections is supported at one end by support member 19 and at the other end by support member 41 as seen most clearly in FIGURE la. As shown in FIGURE 3, the exit end of each section is provided with wiper means 42 and 43 which substantially prevent the water or other liquid on the surfaces of belts 11 and 12 from leaving section 39. lt is to be understood that the water flooding heating means described and illustratedin FIGURE 7 of the copending Opel et al. application could also be used as could any other suitable heating means.
  • housing 30 is adjacent to the last section of housing 29 and wiper means 44 and 45 are provided to substantially prevent the water or other liquid on the surfaces of belts 11 and 12 from entering housing 30.
  • a series of upper rollers 46 and a series of lower rollers 4'7 are also provided in housing 30 to supportv belts 11 land 12, in much the same manner as rollers 37 and 38 1n housing 29.
  • rollers 46 and 47 are so arranged that the belts 11 and 12 assume a converging path in order to compensate for the shrinkage which might occur during postcuring. If the product shrinks away from the belts, certain defects including surface irregularities will occur in the product.
  • rollers 46 are spring mounted in order to urge belt 11 toward belt 12 and thereby compensate for the shrinkage. It is also preferred to provide rollers 38 and 47 with lixed mountings. Hous ing is preferably provided with an electrical heating means, but any suitable heating means, such as a gas burning heater, may be used.
  • washing station 48 may be provided for upper belt 11 and washing station 49 may be provided for lower belt 12.
  • These washing stations simply function to remove any materials which remain on the surfaces of belts 11 and 12 and may comprise any conventional means, such as spray means, ro-tating brushes, solvent solution, etc. It is, of course, desirable to remove any deposits which may be present on the surfaces of belts 11 and 12 since such deposits would otherwise result in the formation of irregularities on the surface of the cast sheet.
  • a fluid composition comprising a polymerizable organic monomer is fed to the inlet end of the casting apparatus and is polymerized while being carried between the moving belts which are substantially parallel for a large portion of the time during which they are in contact with the composition being polymerized and cast.
  • These belts have substantially no relative motion during the time they are in contact with the composition being poiymerized and cast and are inclined at an angle to the horizontal.
  • the configuration of the curved path dened by the lower run of the upper belt and the upper run of the lower belt will be the natural sag or natural curvature of these belts.
  • natural curvature means that curvature which a given belt would assume when the ends thereof are supported at a given height under a given tension. It has been found preferable to calculate the natural curvature for a given tension and to arrange support rollers 37 and 38 such that they assume the path of this natural curvature and then to hold the upper belt under greater tension than the given tension and the lower belt under less tension than Ithe given tension such that the tension on the upper belt tends to pull the lower run thereof against rollers 37 and the upper run of the lower belt can relax against rollers 38.
  • the stainless steel belts are held under a tension of about 5100 p.s.i. for the lower belt and 7000 p.s.i. for the upper belt, these being somewhat less than maximum tension, maximum tension being defined as the greatest tension to which the belts may be subjected without reaching the yield point.
  • the concept of natural curvature and the methods of calculating this curvature are known to those skilled in the art and, as such, do not forma par-t of the present invention. For example the considerations are discussed in The Sandvik Steel Band Conveyor Handbook, published in 1956 by The Sandvik Steel Works Co., Ltd., which is incorporated by reference herein.
  • the curved incl-ine of the belts extends over only a portion of their path between the rollers.
  • the path of the belts is substantially horizontal from a point shortly before they enter the postcuring unit housing 30 until they reach rollers 14 and 17 and the curved path extends between the last section of the housing 29 and rollers 13 and 16.
  • the curved portion of Ithis path is tangent to the horizontal portion and this relationship taken with the length of the path beween rollers 13 and 16 and the horizontal portion plus the natural curvature of the belts under a given tension will determine the vertical distance above rollers 14 and 17 to which rollers i3 and 16 must be raised.
  • the advantages of using the natural curvature configuration are many. Among these advantages are the reduction of supporting structure to a minimum because the belts assume their natural position, greater ease in maintaining control over the spacing between the belts, and, of Igreat importance in commercial operations, a substantial reduction in height of rollers 13 and 16 under that which would be necessary if the belts followed a straight inclined path. This reduction in height is of great importance because it reduces the need to build extremely tall buildings to house the apparatus of the present invention. This interest in keeping the height of rollers 13 and 16 to a minimum is also the primary reason for maintaining the path of the belts through the postcuring ovens on a horizontal level.
  • compositions which may be cast according to the present invention may be various types of liquids including monomeric compounds in the liquid state, preferably when at normal atmospheric pressure, partially polymerized monomeric -compounds and solutions of soluble polymeric resins in Amonomeric compounds.
  • pastes may be employed including mixtures of liquid monomeric and solid polymeric organic compounds which are at least partially soluble in the monomeric compounds.
  • the liquids and pastes used in the present invention may contain plasticizers such as tricresyl phosphate or dibutyl phthalate; fillers such as finely divided inorganic materials; reinforcing materials such as fabrics, glass fibers, wire, etc.; dyes and pigments, providing that these materials do not prevent the polymerization of the monomeric compounds contained in these mixtures.
  • the monomeric material may also contain a parting agent to faciiltate separation of the belts from the cast product and a polymeriztion catalyst such as benzoyl peroxide or acetyl peroxide.
  • Patterned or contoured surfaces may be produced on the cast sheet by providing a matrix having a surface which is the negative of that desired on the surface of the cast sheet between one or both of the moving belts and the composition being cast.
  • This matrix may be attached to the surface of the moving belt or may be mounted on separate rollers operated at such a speed so as to move the matrix material at substantially the same linear speed as that of the moving belts.
  • a viscous syrup comprising 98% methyl methacrylate, 1.5% lauroyl peroxide (catalyst) and .00Ol% Zelec (parting agent), 0.5% ethylene glycol dimethacrylate and 0.05% Tinuvin P (ultraviolet absorber) is fed to the inlet end of an apparatus of the type illustrated in FGURES la and lb.
  • the length of the curved portion of the path of these belts is approximately 135 feet While the length of the horizontal portion of these belts is approximately 30 feet.
  • the vertical distance between the top and bottom of the curved portion was 6 feet.
  • the lbelts are 54 inches wide.
  • the temperature in housing 29 is maintained at 150 F.
  • the belts used were fabricated from highly polished stainless steel.
  • An apparatus for continuously casting a polymerizable organic monomer comprising a first endless liexible belt and a second endless flexible belt, said belts being disposed such that the lower run of said first belt is positioned above the upper run of said second belt, said lower and upper runs passing through a casting zone, said casting zone having a material-receiving end and a materialdischarging end, means for feeding liquid material to said material-receiving end, said material-receiving end being at a higher elevation than said material-discharging end, said lower and said upper runs being inclined throughout at least a substantial portion of said casting zone, the path of said incline being defined by the natural curvature of said belts, said natural curvature being substantially that which said belts would assume if supported only at the elevation of the material-receiving end and at the elevation of the material-discharging end, seal means positioned between the edges of said runs in said casting zone, means for heating said casting zone and means for driving said belts through said zone.
  • the apparatus of claim 1 including support means for said upper run, said support means defining a path substantially the same as that of said natural curvature of said run, backing means for said lower runs, said backing means defining a path substantially the same as that of said natural curvature of said run.
  • the apparatus of claim 2 including tension means maintaining said lower run of said first belt at a tension greater than that used to define the natural curvature and tension means maintaining said upper run of said second belt at a tension less than that used to define said natural curvature.
  • An apparatus for continuously casting a polymerizable organic monomer comprising a iirst endless flexible belt and a second endless flexible belt, said belts being disposed such that the lower run of said first belt is positioned above the upper run of said second belt, said lower and upper runs passing through a casting zone, said casting zone having a material-receiving end and a materialdischarging end, means for feeding liquid material to said material-receiving end, said material-receiving end being at a higher elevation than said material-discharging end, said lower and said upper runs being inclined throughout at least a substantial portion of said casting y'zone, the difference in elevation between said materialreceiving end and said material-discharging end being sufficient to cause a liuid head to be developed by liquid carried between said runs such that the fluid pressure exerted by said liquid is sufficient to maintain said runs substantially parallel to each other and the spacing between said runs at a predetermined distance in said Zone, said irst belt being of such size and weight that the lower run
  • the apparatus of claim 7 including support means for said upper run, said support means defining a path substantially the same as that of the natural curvature of said run, backing means for said lower run, said backing ⁇ means defining a path substantially the same as that of said natural curvature of said lower run.
  • the apparatus of claim 8 including tension means for maintaining said lower run of said first belt at a tension greater than that used to deline the natural curvature of said run and tension means maintaining said upper run of said second belt at a tension less than that used to define said natural curvature.
  • heating means comprises a spray means.
  • each of said flexible belts is a thin metal belt
  • said means mounting said belts includes means against which said runs are pressed by said material in fluid condition.

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  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US593621A 1965-09-28 1966-09-15 Continuous casting apparatus Expired - Lifetime US3371383A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US593621A US3371383A (en) 1965-09-28 1966-09-15 Continuous casting apparatus
GB42038/66A GB1168083A (en) 1965-09-28 1966-09-20 Continous Casting Process and Apparatus
NO164823A NO136340C (no) 1965-09-28 1966-09-21 Fremgangsm}te og apparat for kontinuerlig st¦ping av plastplaterr o.l.
BE687406D BE687406A (de) 1965-09-28 1966-09-26
SE12926/66A SE312426B (de) 1965-09-28 1966-09-26
AT899166A AT303370B (de) 1965-09-28 1966-09-26 Vorrichtung zum Herstellen von Platten od.dgl. aus polymerisierbaren Kunststoffen
DE1645387A DE1645387B2 (de) 1965-09-28 1966-09-27 Vorrichtung zum kontinuierlichen Gießen eines polymerisierbaren organischen Monomers zu steifen Platten
CH1390366A CH468249A (de) 1965-09-28 1966-09-27 Verfahren und Vorrichtung zur Herstellung praktisch harter Kunststoffplatten und -folien
NL666613601A NL147066B (nl) 1965-09-28 1966-09-27 Inrichting voor het continu gieten van kunststofplaten.
DK499566AA DK125003B (da) 1965-09-28 1966-09-27 Fremgangsmåde til kontinuerlig støbning af formstofplader, især polymethylmethacrylatplader, og apparat til udøvelse af fremgangsmåden.
FR78063A FR1497702A (fr) 1965-09-28 1966-09-28 Procédé et appareils de coulée continue de polymères, notamment pour l'obtention de feuilles rigides
JP41063523A JPS4935818B1 (de) 1965-09-28 1966-09-28

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49089765A 1965-09-28 1965-09-28
US593621A US3371383A (en) 1965-09-28 1966-09-15 Continuous casting apparatus

Publications (1)

Publication Number Publication Date
US3371383A true US3371383A (en) 1968-03-05

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Application Number Title Priority Date Filing Date
US593621A Expired - Lifetime US3371383A (en) 1965-09-28 1966-09-15 Continuous casting apparatus

Country Status (11)

Country Link
US (1) US3371383A (de)
JP (1) JPS4935818B1 (de)
AT (1) AT303370B (de)
BE (1) BE687406A (de)
CH (1) CH468249A (de)
DE (1) DE1645387B2 (de)
DK (1) DK125003B (de)
GB (1) GB1168083A (de)
NL (1) NL147066B (de)
NO (1) NO136340C (de)
SE (1) SE312426B (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885901A (en) * 1973-04-04 1975-05-27 Siempelkamp Gmbh & Co Continuous prepress for fiberboard plant
US3894826A (en) * 1973-01-18 1975-07-15 Mitsubishi Rayon Co Apparatus for continuously producing a sheet shaped product
JPS5091680A (de) * 1973-12-19 1975-07-22
US3901639A (en) * 1973-12-19 1975-08-26 Burroughs Corp Sheet plastic article polishing apparatus
US3926542A (en) * 1972-09-04 1975-12-16 Kuesters Eduard Continuous press
US3988098A (en) * 1968-12-30 1976-10-26 Mitsubishi Rayon Co., Ltd. Apparatus for continuously casting a sheet and the like
US4046850A (en) * 1973-10-25 1977-09-06 Sumitomo Chemical Company, Limited Continuous casting of a polymerizable composition between moving endless belts
US4105387A (en) * 1974-05-24 1978-08-08 Eduard Kusters Side sealing means for a continuous press
US4803026A (en) * 1986-10-03 1989-02-07 Mitsubishi Rayon Company, Ltd. Process for preparation of acrylic resin sheets having excellent moldability and solvent resistance
WO1994008787A1 (en) * 1992-10-22 1994-04-28 Aristech Chemical Corporation Crosslinked acrylic sheet with enhanced vacuum molding attributes
US5415931A (en) * 1990-08-27 1995-05-16 Aristech Chemical Corporation Acrylic-filled thermoformable acrylic sheet
WO1998017713A1 (en) * 1996-10-21 1998-04-30 Aristech Chemical Corporation Process for making a mineral filled acrylic sheet having a matte finish with improved stain resistance
EP0958877A2 (de) 1998-04-23 1999-11-24 Premark RWP Holdings, Inc. Plattenschneidmaschine zum Abtrennen einer Platte,die Polymerteilchen enthält mit einer Abmessung grösser als die Dicke der Platte

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045209B2 (ja) 1976-07-20 1985-10-08 住友化学工業株式会社 連続重合方法
JPS61268413A (ja) * 1985-05-24 1986-11-27 Mitsubishi Rayon Co Ltd 不規則な異色流れ模様を有する合成樹脂板の連続的製造方法

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US2338770A (en) * 1942-11-06 1944-01-11 Goodrich Co B F Method and apparatus for treating strip plastic material
US2867843A (en) * 1955-01-10 1959-01-13 Dow Corning Apparatus for compacting finely divided solids
US2929793A (en) * 1957-07-12 1960-03-22 Joseph J Hirsh Method of making closed cell polyvinyl chloride foam
US3007206A (en) * 1955-05-06 1961-11-07 Owen H Griswold Methods of molding thermoplastic sheets
US3011211A (en) * 1960-02-25 1961-12-05 Goodrich Co B F Elastomeric strip shrinking apparatus and method
US3016573A (en) * 1959-07-17 1962-01-16 Edward B Blue Double rotation apparatus for molding of hollow articles from liquid plastic and the like
US3250841A (en) * 1963-08-16 1966-05-10 Goodrich Co B F Elastomeric shrinking method and apparatus
US3262151A (en) * 1964-09-30 1966-07-26 Dyfoam Corp Apparatus for molding plastic material
US3269882A (en) * 1964-02-06 1966-08-30 Specialty Converters Manufacture of foam products
US3274643A (en) * 1964-07-20 1966-09-27 Dyfoam Corp Apparatus for determining the expansive pressure of molded polystyrene beads
US3278659A (en) * 1963-02-26 1966-10-11 Specialty Converters Method and apparatus for casting foam plastic sheets on a curved casting surface

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1808525A (en) * 1928-09-11 1931-06-02 Goodrich Co B F Strip-feeding apparatus
US2311617A (en) * 1941-04-22 1943-02-16 American Anode Inc Method and apparatus for making thick latex rubber sheeting
US2338770A (en) * 1942-11-06 1944-01-11 Goodrich Co B F Method and apparatus for treating strip plastic material
US2867843A (en) * 1955-01-10 1959-01-13 Dow Corning Apparatus for compacting finely divided solids
US3007206A (en) * 1955-05-06 1961-11-07 Owen H Griswold Methods of molding thermoplastic sheets
US2929793A (en) * 1957-07-12 1960-03-22 Joseph J Hirsh Method of making closed cell polyvinyl chloride foam
US3016573A (en) * 1959-07-17 1962-01-16 Edward B Blue Double rotation apparatus for molding of hollow articles from liquid plastic and the like
US3011211A (en) * 1960-02-25 1961-12-05 Goodrich Co B F Elastomeric strip shrinking apparatus and method
US3278659A (en) * 1963-02-26 1966-10-11 Specialty Converters Method and apparatus for casting foam plastic sheets on a curved casting surface
US3250841A (en) * 1963-08-16 1966-05-10 Goodrich Co B F Elastomeric shrinking method and apparatus
US3269882A (en) * 1964-02-06 1966-08-30 Specialty Converters Manufacture of foam products
US3274643A (en) * 1964-07-20 1966-09-27 Dyfoam Corp Apparatus for determining the expansive pressure of molded polystyrene beads
US3262151A (en) * 1964-09-30 1966-07-26 Dyfoam Corp Apparatus for molding plastic material

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988098A (en) * 1968-12-30 1976-10-26 Mitsubishi Rayon Co., Ltd. Apparatus for continuously casting a sheet and the like
US3926542A (en) * 1972-09-04 1975-12-16 Kuesters Eduard Continuous press
US3894826A (en) * 1973-01-18 1975-07-15 Mitsubishi Rayon Co Apparatus for continuously producing a sheet shaped product
US3885901A (en) * 1973-04-04 1975-05-27 Siempelkamp Gmbh & Co Continuous prepress for fiberboard plant
US4046850A (en) * 1973-10-25 1977-09-06 Sumitomo Chemical Company, Limited Continuous casting of a polymerizable composition between moving endless belts
JPS5335592B2 (de) * 1973-12-19 1978-09-28
US3901639A (en) * 1973-12-19 1975-08-26 Burroughs Corp Sheet plastic article polishing apparatus
JPS5091680A (de) * 1973-12-19 1975-07-22
US4105387A (en) * 1974-05-24 1978-08-08 Eduard Kusters Side sealing means for a continuous press
US4803026A (en) * 1986-10-03 1989-02-07 Mitsubishi Rayon Company, Ltd. Process for preparation of acrylic resin sheets having excellent moldability and solvent resistance
US5415931A (en) * 1990-08-27 1995-05-16 Aristech Chemical Corporation Acrylic-filled thermoformable acrylic sheet
US5530041A (en) * 1990-08-27 1996-06-25 Aristech Chemical Corporation Process of making acrylic-filled thermoformable acrylic sheet
WO1994008787A1 (en) * 1992-10-22 1994-04-28 Aristech Chemical Corporation Crosslinked acrylic sheet with enhanced vacuum molding attributes
US5308425A (en) * 1992-10-22 1994-05-03 Aristech Chemical Corporation Method of making crosslinked acrylic sheet with enhanced vacuum molding attributes
US5418048A (en) * 1992-10-22 1995-05-23 Aristech Chemical Corporation Crosslinked acrylic sheet with enhanced vacuum molding attributes
WO1998017713A1 (en) * 1996-10-21 1998-04-30 Aristech Chemical Corporation Process for making a mineral filled acrylic sheet having a matte finish with improved stain resistance
EP0958877A2 (de) 1998-04-23 1999-11-24 Premark RWP Holdings, Inc. Plattenschneidmaschine zum Abtrennen einer Platte,die Polymerteilchen enthält mit einer Abmessung grösser als die Dicke der Platte
US6196104B1 (en) 1998-04-23 2001-03-06 Premark Rwp Holdings, Inc. Apparatus for producing sheets of solid surfacing

Also Published As

Publication number Publication date
BE687406A (de) 1967-03-28
NO136340C (no) 1977-08-24
CH468249A (de) 1969-02-15
JPS4935818B1 (de) 1974-09-26
NO136340B (de) 1977-05-16
DK125003B (da) 1972-12-18
AT303370B (de) 1972-11-27
NL6613601A (de) 1967-03-29
GB1168083A (en) 1969-10-22
SE312426B (de) 1969-07-14
NL147066B (nl) 1975-09-15
DE1645387B2 (de) 1978-05-18
DE1645387A1 (de) 1970-07-30

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